"Premier League Champions 17/18", City tweeted soon after the final whistle, when the fifth English top-flight title of its history was assured.
Pep Guardiola's side put themselves on the brink of title glory with Saturday's 3-1 victory at Tottenham and United's failure to take points off the bottom side on Sunday left City beyond mathematical reach.
In his pre-match press conference on Friday, Mourinho told a journalist that he only needs four points to stay second and the derby win against Manchester City last week should set their hopes on course.
United pushed numbers forward in the closing stages, but Foster never really looked in danger of being tested again as United succumbed to a defeat that was celebrated by the blue half of Manchester with even more vigour than usual.
The three-man midfield formation worked very well for Manchester United last weekend against City and Mourinho is likely to go into Sunday's game with a similar setup, meaning Ander Herrera starts once again in the middle alongside the consistent and reliable Nemanja Matic and United's hero from the last game, Paul Pogba.
Sand Bar Softball Team Celebrates End of Season
Solge and Jones both drive in two runs for Padua (2-3), who travels to Brandywine Monday at 3:45. "We needed to score some runs". Trenton Adkins celebrated his birthday one day early with a two out walk off single to complete an Oriole double header sweep.
Instead of City likely clinching the title at home to Swansea next weekend, that game at Etihad Stadium will now be a party and a celebration of one of the Premier League's finest teams which could yet break a slew of records by the end of the season.
Attack: Alexis Sanchez produced an encouraging performance in the second half at the Etihad so the Chilean global should keep his place in the attack against West Brom.
United's forwards were kept at bay in the first-half and Ben Foster's breathtaking save to deny Romelu Lukaku gave the Baggies real belief in the 65th minute.
In the 2013/14 season, after Mourinho's Chelsea side started Liverpool's fall from the title the Blues drew 0-0 at home to Norwich City (who were relegated following the draw), ending their own title ambitions. United have won their last five league matches.
Jay Rodriguez was the unlikely man to send the seal the championship for City with his 74th-minute goal at Old Trafford.